4.3.23. Check of a free wheeling (люфта) steering wheel

At the increased free wheeling of a steering wheel driving as it with delay reacts to actions of the driver is at a loss. Besides, the increased course which it is not possible to eliminate with adjustment of the steering mechanism, testifies to malfunction of a steering (weakening of fastening of the steering mechanism, steering drafts or wear of their details).

Check люфт a steering wheel on the car established on an equal nonslipping covering. Люфт should not exceed 5 °. It is possible to determine люфт and in linear units (mm) by a formula of L = (5 °/360 °) pD, where

L — люфт a steering wheel, mm;

p= 3,14;

D — external diameter of a steering wheel, mm.

For the steering wheel which external diameter makes 375 mm, люфт should not exceed 16–17 mm.

It be required to you: a ruler, swept (or a wire) for drawing of labels.

1. Establish forward wheels in the situation corresponding to rectilinear movement of the car.

2. Establish a ruler so that its end face rested against the dashboard, and the plane of a ruler concerned an external surface of a rim of a steering wheel.	3. Without changing the provision of a ruler, turn a steering wheel to the right till the beginning of turn of forward wheels.

4. In this situation put on a rim of a steering wheel the second label (fix a wire).

5. Measure on a rim distance between labels. It should be no more than the calculated value. If the distance (a free wheeling of a steering wheel) more, is necessary to establish the reason and to eliminate it.